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create_has_and_belongs_to_many_reflection

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create_has_and_belongs_to_many_reflection(association_id, options, &extension) private

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# File activerecord/lib/active_record/associations.rb, line 1619
        def create_has_and_belongs_to_many_reflection(association_id, options, &extension)
          options.assert_valid_keys(valid_keys_for_has_and_belongs_to_many_association)

          options[:extend] = create_extension_modules(association_id, extension, options[:extend])

          reflection = create_reflection(:has_and_belongs_to_many, association_id, options, self)

          reflection.options[:join_table] ||= join_table_name(undecorated_table_name(self.to_s), undecorated_table_name(reflection.class_name))

          reflection
        end
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